Rotary tool machine



March 2, 1943. E. R. MOTCH, JR, ETAL 2,312,573

ROTARY TOOL MACHINE Filed April 26, 1940 4 Shets-Sheet 1 INVENTOILSEDWIN RMOTCH Jr. and JOHAN GUSTAF MOOHL m m g ATTORNEY 5 March 2, 1943.E. R. MOTCH, JR, ETAL 2,312,573

' ROTARY TOOL MACHINE Filed April 26, 1940 4 Sheets-Sheet 3 Ins--5.

IN VENTORI) ATTGRNE March 2, 1943- E. R. Mom, JR, Em 2 312,513

ROTARY TOOL MACHINE Filed April 26, 1940 4 Sheets-SheetA mfimm m Od E nm m m W M O NHCI MN 6. nn M mw 00- a mm. o- MMPK EJ m: NO 0: m: b: Y. B

Patented Mar. 2, 1943 UNITED STATES PATENT OFFICE ROTARY TOOL MACHINEApplication April 26, 1940, Serial No. 331,746

6 Claims.

The present invention relates to a machine too-l wherein a plurality ofrotary tools, such as saws, milling cutters or grinding wheels, aremounted on a rotatable member or face plate and circumferentially spacedabout the work-piece, which is located at the center of the face plate.These rotary tools are rotated about their own individual axes and alsotraversed around the periphery of the work by virtue of the rotation ofthe face plate. In addition to the traverse or circumferential travel ofthe tools, an infeed and outfeed movement is imparted to them wherebythey are moved bodily inwardly and outwardly with respect to the work,such latter movement being efiected through the medium of a secondrotatable member or cam plate. In our prior U. S. Patent No. 2,103,486,we have disclosed and claimed a rotary tool machine of the foregoinggenerally indicated characteristics, and in our copending application,Serial No. 297,732, filed October 3, 1939, now Patent No. 2,281,450,granted April 28, 1942, we have disclosed an improvement on suchmachine, consisting in the adaptation of fluid-actuated power means foreffecting various tool movements. The invention of our presentapplication constitutes, in turn, a still further improvement upon ouraforesaid prior patent and pending application.

The general object and nature of our present invention is to provide animproved construction for a rotary tool machine of the characterindicated, wherein the factors of operative control, efliciency andproduction capacity are enlarged upon and increased. More particularly,the present invention includes a novel construction for moving the camplate with respect to the face plate and by fluid pressure actuation.The invention also includes a fluid-actuated or hydraulic motor drivingmeans adapted to transmit their driving power directly to the rotationof both rotatable members, viz., the face plate and the cam plate, suchmotor drives being individual to each plate. In our aforesaid co-pendingapplication Serial No. 297,732, we have taught the advantage incident tothe utilization of a fluidactuated power means in order to automaticallycompensate for irregularities in the texture of accelerating ordecelerating the normal rate of rotation of the cam plate with respectto the face plate, in order to accomplish the function of producinginfeed (or outfeed) movement of the rotary tools.

To the accomplishment of the foregoing and related ends, said invention,then consists of the means hereinafter fully described and particularlypointed out in the claims. The annexed drawings and the followingdescription set forth in detail certain mechanism embodying theinvention, such disclosed means constituting, however, but one ofvarious mechanical forms in which the principle of the invention may beused.

In said annexed drawings:

Fig. l is a side elevational view of the rotary tool machine embodyingthe principle of our invention; Fig. 2 is a vertical, sectional view ofthe machine shown in Fig. 1; Fig. 3 is an end elevational view,partially broken away and partially in section, of the machine of Figs.1 and 2; Fig. 4

is a side elevational view, partially in section, of a modified form ofconstruction of the machine; and Fig. 5 is a diagram illustrating thehydraulic motor control system applied to the machine of Fig. 4.

Now referring more particularly to Fig. 1, the machine shown thereinconsists essentially of a base frame I carrying the upper housing frame2, the electric drive motor 3, the external or outboard chuck housing 4and the rotary tools 5.

The coolant fluid nozzle 6 is located adjacent the rotary tools 5 and isfor the purpose of directing a stream of cooling and lubricating fluid,such as an oil or soap emulsion onto the work. A reservoir 1 is locatedin one end of the frame I for receiving such coolant fluid and turningsand cuttings from the work. Control levers and buttons are located onthe side of the machine, as generally indicated at 8.

Now directing attention to Figs. 2 and 3, the outboard chuck jaws Ill(only one of which is shown) are carried in slides II mounted in theoutboard housing 4. Feed screws I2 connected to each of the slides I Ieffect the movement of the latter, together with the chuck jaws I I].The feed screws I2 are rotated by means of a chain and sprocketconnection I3 to the cross shaft I4, which, in turn, is rotated throughthe gears I5, I6 and I 1 from the drive pinion I8 of the fluid motor I9.Operation and control of the fluid motor I9 is, of course, accomplishedby means of a control lever mounted on the side of the machine at 8, ina manner and by hydraulic pressure connections well known to thoseskilled in the pinion 25 engaging with the external tooth ring gear 25,which is driven by means of the pinion 2! on the shaft ZSthrough thegear train, indi-- cated generally at 29, by means of the fluid motor35.

The outboard bracket 3| carries a roller 32for v supporting the work asit is fed into themachine to be gripped by the chuckjaws l and 2,0.

The electric drive motor 3 is connected by means of the belt '35 to thepulle 55 on th gross shaft '31, which carries the gearS'I'. The gear 3'!is tdrivably connected through the idler gears 38 and 39 to the gear 48on the worm shaft 41;. The worm 42 on the worm shaft 4! meshes with theWorm wheel 43 mounted upon the righthand end of the rotatable sleeve.44., The internal toot-h ring gear 45 1s carried by the left-hand end ofthe rotatable sleeve M and meshes with theepicyclie or planetary ears 45on the shafts 41, which, turn, have the pinions 48 meshing with theidler ears 49 conn-ectedto the pinions 50 on the in dividualdriveishafts carrying the rotary tools 5.

The rotary tools and their drive shafts are supported in the housin s 5!which are piv-ota'lly mounted in the rotatable memberor faceplate 52,.Connecting arms 53 are connected to the housings 5! at the point ofpivotal support and carry on their outer ends rollers 54 which "are.received in radial slots 55 in the cam plate 56. Relativgrotationbetween the plates 52 and 5.5 will cause a pivotal movementof thehousings 5! through the medium of the rollers 54, on, the ends ofthearms 53 moving in' the slots 55.. Thus, referring'to Fig. as theplate 55 moves in a counterclockwise direction with respect to the plate52,1the slot 5.5 will be moved further away from the point of pivotalmounting of the hous ings 511 and connecting arms 53,, causing therollers 54 to move radially inward in theslots 55 and effectingcounterclockwise, pivotal movement of the housings '51 about theirpivotal mounting points, thus, moving the ends of the housings 5|carrying the tools 5 111a radially inward direction. Such pivotalmovement, o course, constitutes the 'infeed and outfeed' movement of therotary tools 5.

The face plate '52 has a longitudinally extend ing portion or barrel 5].The cam plate 56 also has a barrel 58 partially overlying the barrel5.1. The barrel 5.! carries a worm wheel59. drivenby the worm 69. Thebarrel 58-is-normally rotatable with the barrel 57. mounted upon a shaftconnected to the pinion drive gear of the fluid motor 6 l .5

An'elongated key 62 is longitudinally movable in the'slot 53 in thebarrel; 51. It will be noted that thekey 52 has. a laterally projectinglug '54 adapted to engage with a similar lug on the stop 65. The limitstop 65 is movable in an axial r t o o in a d r n parall l to th lonitudinal movement of the key 62-, by meanjs of; the threaded adjustingbolt 66.

The barrel 5a contains a slot it which is angue ma inclined to the aXisr rotation. Apia u The worm "65, in turnyis Viipper housing 2, asindicated at H. arms of the yoke 16 ar povotally connected at carries aroller 12 engaging in the slot and also connects to a shoe 73 which isadapted to travel around in the groove or channel 14 in the shiftingring 15. attached to the key 62. Thus, the extent of move ment of thepin H and roller 12 in the inclined 7 slot 10 is limited and regulatedby the position of the limit stop 65.

A' shifting yoke 16 is piv-otally mounted to the The lower 18 tothe-shifting ring 15. The upper portion or throat of the yoke 16 has asaddle 19 which, by means of its engagement with the shoulders 7 formedbyfthe reduced portion 89 on the connecting rod BL'is operativelyconnected to the latter so that reciprocal movement of the connectingrod ill will effect rocking movement of the yoke 1-6 and, in turn,produce an axial, lateral movement of the shifting ring 15; Suchshifting movement of the ring 75 is guided and maintained in properalignment by means of fixed "supporting bars, such as shown ;at;'! 5engaged by drilled bosses '02 cars on the ring-15. This shiftingmovementof the ring 15 due to the engagement of the pin ll and roller 1:2 in theinclined slot -70, will-correspondingly produce "rotation'o'f the barrel58-and cam plate 56, whether the latter be stationarypr rotating withthe barrel '5'! of the face plate 52. In this manner, relative rotation,or acceleration or deceleration of the rate of rotation-of the cam plate55 with respect vto the face plate .52 is pro duced, with incidentinfeed or outfeed of the rotary tools 5 with respect to the'work-piece."The preliminary setting of theposition of the 'cam plate 56 withrespect to the faceplate 52', as well as the amount'of infeed oroutfeed, is controlled by the adjustment of the position of the limitstop The connecting rod 8-l leads tothe'pistonfl oiprocable in thehydraulic cylinder 83 o Control of fluid pressure introduced to :thecylinder.

83 thu efiects theabove-described infeed and outfeed oftherotary toolsi,V V g Y In the alternative form of construction shown in Figs. 4 and l'he cam plate doesnot derive its rotative movement through transmissionfromthe' face plate, but rather from an individual :fluid motorconnected directly to it; 7 The change in relative rates of rotation ofthe face plate 'andeam plate is obtained by reason of-controleof thefluid pressure to each of the prime moving-flui-dmotors connected tothe-'individua'l-plates. Directing at,

tention to Fig. it will be seen that thecross shaft 4! drives the sleeve44', carryingthe-exter nal tooth ring gear 45 meshing withtheepieyclicmeshing with the-- worm '91.; The worm '9! is mounted upona shaft 92 towhich is connected the drive pinion'of the fluid motor Q3.

The barrel 58 o-f the'camplate- 56 likew-isecar ries a worm, wheel 94meshing with. the worm; 95

the drivepinion-iot the r on the shaft 95 driven-by second fluid motor91. The fluid pressure control valve and system for actuating thedrivemotors-93-and=l is illustrated in the diagram ofFig. 5. The; pressurepump P (which. is driverr 'fromshait h'hgas shown in'Fig. 2) delivershydraulicrfiuid sushi-as oil: from the, reservoir L00throughtherintaketM to thefoutlet. conduit H12. Theconduitflll cont-:

The inner end of the pin H is fixedly nects to-the valve body I03 inwhich the spool" or dumb-bell valve I04 is located. A manual operatinglever I05 is connected to the projecting end of the dumb-bell valve I04for reciprocae tion of the latter within the Valve body I03. Theconduit|06 leads from the valve body I03 to the drive motor 93. Theconduit I01 connects the drive motor 93 in series flowrelationship withthe drive motor 91. The conduit I08 leads to the valve body I09 adjacentthe valve body I03. The dumb-bell piston I I is reciprocable within thevalve body I09 and has a projecting stem portion II I adapted to contacta similar projecting stem I; I 2 on the dumb-bell valve I04.

A relief valve H3 connects the conduit I to the conduit I I4 which leadsto the righthand end of the valve body I09. The relief valve II5connects the conduit I01 to the return conduit H6,-

to the reservoir I00. The return conduits I I! and H8 are connected inparallel to the valve bodies I04 and I I0 respectively, and join withthe return line- I I5.

. A'relief valve H9 connects the'conduit I02 to the return conduit I20to the reservoir I00.

The valve I I9 is set at the predetermined maximum pressure which is tobe delivered from the pump P to the above-described valve and conduit.

pressure system. The relief valve H3 is set at a predetermined pressurebelow that of the valve H0 and the relief valve H5, in turn, is set at aslightly lower predetermined pressure. Thus, for the purpose ofconvenience of explanation of the mode of operation of the controlsystem, let it beassumed that the valve H9 is set at 700 pounds persquare inch, the valve [I3 at 600 pounds per square inch and the valveH5 at 500 pounds per square inch. The operation of the control systemwill then be as follows: The operating lever I05 is set at the full lineposition, whereupon, fluid under pressure is conducted from the con duitI02 to the valve I03, to the conduit I06, to the drive motor 93. Theworm 9| commences to drive the worm wheel 90 and the face plate 52.Exhaust pressure from the motor 93 is led through the conduit I01 to themotor 9?. However, the motor 91 cannot operate or pass fluid pressurethrough it because its exhaust conduit I08 is closed by the dumb-bellvalve I I0. Thus, there will occur relative rotation between the faceplate 52 and the temporarily stationary cam plate 55, causing infeed ofthe rotary tools 5. The relief valve II5 is set at the minimumpredetermined pressure for effecting the required drive of the motor 93and face plate 52, and in our assumed instance, is 500 pounds per squareinch. Thus, exhaust fluid from the motor, at 500 pounds per square inchpressure, will be conducted through the relief valve II5 to the returnline IIB, to the reservoir I00.

As the relative rotation between the face plate 52 and the cam plate 56approaches its limit, or in the event that some unforseen resistance toincreased infeed occurs, such as an irregularity due to texture or shapein the work-piece, the pressure in the conduit I05 will build up untilthe relief valve II3 operates (at our assumed pressure of 600 lbs. persquare inch) and conducts pressure through the conduit II4 to therighthand end of the valve body I09, shifting the dumb-bell valve III}to a lefthand position as indicated by the dotted lines in Fig. 5. Atthis new position of the valve IIO, the exhaust line I08 of the motor 91will be opened to the return line IIB, thus permitting driving rotationof the motor 91 and cam plate 56.

Rotation of the face plate 52 and of the cam plate 56 is thus continueduntil the end of the cutting or machining operation, such as cutting offa section of pipe, for example. At thispoint, the lever I05 is shiftedto the dotted line posi-. tion in Fig. 5, moving the dumb-bell valve .I04 to the dotted line position and the dumb-bell valve I I0 tothe fullline position. Pressure from the conduit I02 will then be led to theconduit I2I, to the conduit I01, to the opposite side of the drive motor93, thus tending to reverse its direction of rotation. .The conduit I06then becomes the exhaust line from the motor 93, to the valve I03, tothe exhaust line III, to the reservoir I00. The valve IIO being again infull line position, the line I08 is shut off and the motor 91 thusprevented from rotation, so that the cam plate 56 will be heldstationary and outfeed movement of the tools 5 effected. At the end ofsuch outfeed movement, with incident resistance to further rotation ofthe face plate 52, pressure will be built up in the conduits I02 and I06untilrelieved by the opening of the relief valve II9,

explained, change being made as regards the mechanism herein disclosed,provided the means stated by any of the following claims or theequivalent of such stated means be employed.

We, therefore, particularly point out and distinctly claim as ourinvention:

1. In a rotary tool machine, the combination of a. rotatable member, aplurality of rotatable tools, means supporting said tools on saidrotatable member for bodily movement towards and away from a commoncenter, mechanical power drive means for rotating said tools about theirown axes, fluid power means for rotatably driving said rotatable member,a second rotatable member mounted concentrically with said firstrotatable member, a second fluid power means for rotatably driving saidsecond rotatable member at a different rate of rotation than said firstrotatable member, and means interconnecting said second rotatable memberand said supporting means so constructed and arranged as to effect theaforesaid bodily movement of said tools on relative rotation of saidrotatable members.

2. In a rotary tool machine, the combination of a rotatable member, aplurality of rotatable tools, means supporting said tools on saidrotatable member for bodily movement towards and away from a commoncenter, mechanical power drive means for rotating said tools about theirown axes, a second rotatable member mounted concentrically with saidfirst rotatable member, means interconnecting said second rotatablemember and said supporting means so constructed and arranged as toefiect the aforesaid bodily movement of said tools on variation in therelative rotative positions of said rotatable members, and fluid motorsdrivably connected to each of said rotatable members.

3. In a rotary tool machine, the combination of a rotatable member, aplurality of rotatable tools, means supporting said tools on saidrotatable member for bodily movement towards and away from a commoncenter, mechanical power drive means for rotating said tools about theirown :axes, a second irotatiable :member mounted concentrically with saidfirst n'dtatabie member, means interconnecting said second rotatablemember and said supporting means so con-'- stnucted and arranged as todirect the a for'esai'o 'bodiiyimovement ofsaifi 'toois on variation therelative rotative positions ofisa'id rotatable :mein= bars, and -a pairof fluid dr ive motors and it 'Wor-in and :gear drive train connectingeaen oi said motors to each of said :rotatable' meinbers.

4. In :a rotary tool machine, the coin kiin aitio'a i Of :a. rotatablememben a morality of rotatable tools, means supporting said tools onsaid rotatable member for bodily movement towards anti away :from acommon :eenter, mechanical ower drive means for rotating said toolsabout "their own axes, at second rotatable member mounted era rotatablemember, a plurality of rotatable tools, means supporting said tools ons'aici-rot'atable member for bodily movement towards and away from acommon center, mechanicai power drive means for rotating said toolsabout their own axes, a second rotatable ineinberino'untedconcentrically with said first rotatable 'rne'm'ber;

means interconnecting said second rotatable member and said supportingmeans so constructed and arranged 'as to effect the aforesaid members,nun motor drivabiyeoiineoten of said rotatable me soli'rce, and meansfor introtinei a predef & e fi'om d souree to one or said fluid motorsaiiti mean tennineii minimum "ainoiirrt ei pressure in series nowtherefrom to theotner i said motors.

'6. In a rotary tool mhwifi; the combination of a rotatable inmbf,,flenmity or mmune toois ,vzmean's sufipoihhg said on said rotate abiemember for bodily movement towaras and away from a common mentorineeiianieai ii'i'ivir" drive means for iota me said tools about t e'irown axes, a seoond "1- tatubie member "neui rea concentrically Wit aid'firs't rotatable firearm; means interconii tinig" said second rotatatiemember and said importing in so eam strirct'ed and ar r'ang'ei i' as toeffect 1; earneseia bodily movement of said tools on variation in V therelative rotative positions of said rotatafi'fe' members, fluidino'to'rs d-i'iv'ably oonn'eoti to each of said rotatable member's,a-sin'gie'ores= sure source adapted teiiei'ivei nuia at a predeterminedmaximum pressure, mite and ondiiit means adapteu to eminent saidpre'ssiir'e to Born of said 'i'notors series now, a. r-eiief "valve forregulating the amount ofpressi'ire' tie: liverabl'e to the seeond ofsaid motors in soon series now, and a second valve means for open: mgthe exhaust or said second motor when the pressure delivered to saidfirst motor in "such series becomes greater than 'said' amount or presure. I r

JOHAN' GUSTAF MOOHL.

